Improved bolt machine



@glitten tant gatritt @ffice VIliLIAh-I lV. HUBBARD, OF PHILADELPHIA, PENNSYLVANIA.

Letters Patent No. 71,012, dated Novemer 19, 1867.

IMPROVBD BOLT MACHINE.

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TO ALL WHOM IT MAY CONGERN:

Be it known that I, WILLIAM W. Heimann, of Philadelphia, Pennsylvania, have invented a Machine for Making Bolts; and I do hereby declare thefollowing to lbc a full, clear, and exact description ofthe same.

My invention consists of certain mechanism for forging and heading bolts, the main feature of the invention consisting of two hammers, one having a. head and anvil for forging, and the other a head and anvil for heading the bolts, both hammers being operated by one shaft, having two cranks, all of which and other improvements are fully described hereafter.

In order to enable others familiar with machinery of this class to make and use my invention, I will now proceed to describe its construction and operation, reference being had to the accompanying drawing, which forms a part of this specication, and in whichi Figure 1 is a front elevation of my improved bolt-machine.

Figure 2, a sectional elevation ot' the same on the line 1-2, fig. 1.

Figure 3, a Sectional elevation on the line 3-4, iig. 1. A

Figure 4, a portion of iig. 3, showing some of the operating parts in a diii'erent position; and

Figure 5 a detached sectional plan view on the line 5 6, iig. 1.

Similar letters refer to similar parts throughout the several views. A is the bedplate of the machine, and B and B' the side frames, which are secured to the said bed-plate and to each other. A. shaft, C, having two cranks, turns in suitable bearings on the opposite -side frames, and to the cranks are connected two rods D and D', each of which is in two parts, the upper portion consisting of a fiat plate, a, anda rod, a', the latter iittin'g into'and'sliding in the ,lower portion, which contains a spiral spring coiled round the saith rod a'. E and E' are wooden arms secured at one end to sockets c, hung by pins c' to the frame ofthe machine. The plates tt'of the connecting-rods D and D' enter slots cut in each of these arms,V and a pin, cZ, in the latter passes through an I -shaped slot c, formed in each of the plates a, (see igst 2 and The outer end of the vibrating arm E passes `through an opening irf a hammer-head, F, `which is arranged to slide in vertical guides formed in the side frame B of the machine, and a block of w0od,f, which is let into the upper end of the hammer, strips the top ofthe frame B, and servesas a cushion when the hammer issuddenly i elevated. A steel facing,.g, having a semicircular groove on its under surface, is secured to the hammer, and the anvil G consists 'of a squareblock, titting in arecessed box, y', of steel, let into the frame B, and adjusted and held in a proper position4 by set-screws lt, which pass through the box g' and through the movable front plate it' of the same, (see iigs. 2v and '5.) The opposite vibrating arm E' passes through a similar hammer, F',r which slides in guides en the opposite side frame, and is faced with a cylindrical piece, .2', of steel. Directly beneath this hammer, and in a. recess in the frame B, isvhung, by a pin, .1, a block or anvil, H, into the upper end of which is set an adjustable steel tube, j. A rod slides in this tube and in an opening of the block H, its lower end resting upon a lever, It. Projecting from the rear of the block His a rod, Z', which is connected by a weighted chain, m, to a portion ofthe frame, as shown in fig. 3, and by means of which the block is maintained in an upright position. A lever, I, is hingeilto a projection on thebed-plate A, and is connected by a rod, 1t,

iig. 1, to an arm, at', of a short spindle, p, which passes through a port-ion of the frame, another arm, p', of this spindle bearing against the rod Z5, iig. 8, so that, by depressing the 'lever I, the block II is caused to assume the inclined position shown in iig. 4, for a purpose described hereafter. Each of the connecting-rods D and D' is connected, by a rod, q, to a spring, q', secured to the frame of the machine, these springs tending to maintain the rods in such a position that the pins at of the vibrating arms shall be in the vertical portion of thevL-shaped slots e, (see figs. 2 and The rods are also connected by chains t* to the arms 1" of the rocli-spindles .s s', which turn in the opposite side frames, the arms-,being notched at their outer ends for the reception of rods t, projecting from each of the vibrating arms E and E'. vAt the outer end of the spindle s is an arm connected by a rod, n., to alever, J,'hinged to the bed-plate of the machine, and thespindle s' is connected in a similar manner to a lever, J', also hinged' to the bed-plpte. Springs o, which are secured to the bed-plate, have a tendency to raise the levers J vand J', and to turn the notched arms t" to such a position as to be in contact with the rods t, and consequently to maintain the arms E and E' inthe horizontal,A or nearly horizontah'position shown in Aiig. 3. When the shaft C is rotated, the rods D and D', as before described, are so hel-d by the springs q' that the pins 0l of the vibrating arms a're caused to traverse' back and forth through the vertical portion of the slots c, the arms consequently remaining stationary.

When it is desiredto operate the-hammer F, the lever J is depressed, in order to withdraw the notched arm r from the rod t. The arm E is then free to vibrate, and falls until its pin CZ reaches the bottom of the slot e. At the same time, by means of the chain r, the red D vis drawn back (the spring g yielding, as shown in fig. 2,) until the pin cl enters the horizontal portion of the slot e. The arm Eis then vibrated as the crankshaft revolves, and the hammer F rises and falls in its vertical guides, strikingT the anvil G at every descent. There is a scmicircular groove in the anvil, directly beneath the groove in the steel facing g, and the rod from which the bolts are to be made, rest-ing in the anvil-groove, receives repen-ted blows of the hammer, and is at the same time turned by the attendant, in the usual manner, until it is properly rounded and reduced to the required diameter. The forged end is then cut from the rod, and the severed portion is placed upright in the tube j, its lower end resting on the rod j', as shown in red lines, fig. 3. The lever J is then depressed, and the hammer F operated in thesame manner as the preceding one, and the rod which projects 'from thctubej receives the blows ofthe hammer, and is thus headed. As soon asthis operation is completed, the pressure upon the lever J is removed, its spring r is then caused to rise, and the notched arm r is brought in contact with the rod t, which prevents the arm E and hammer f'romvagain descending. At the saine time the spring g brings the rod D to its former position, fig. 3, and the hammer and its shaft remain stationary. The lever I is now depressed, and the block or anvil'H is turned to the inclined position shown in fig. 4 by the devices before described. .The rodj is then elevated by operating its lever 7c to push the headed bolt out of the tube j, after which, byimeans of the weighted chain m, the block H is aga-in brought to its proper upright position, and another forged rod may be inserted and headed as before.

The anvil G, as before described, is a plain, square blok of steel, let into a recessed bex forming a part of the frame of the machine, and the anvil, as it wears away and becomes shortened by repeated dressing, may be raised to the proper height-hy inserting beneath it thin plates of metal fr, iig. 2; or, if it be desired to raise the anvil a considerable distance, in order to shorten the stroke of the hammer, a thicker plate may be inserted beneath it, and, by removing th'e front plate 7L of the box, the anvil may be withdrawn from the same. The

tubej can also ,be adjusted to suit bolts of dilfercnt lengths, the length of the stroke ofthe hammer F depending also upon the height of the object to be struck.

When the stroke of the hammers is thus varied, the length of the crank-rods must be correspondingly altered, and for this purpose they are made in two parts, which adjust themselves to each other, the spiral spring 6 compressing or yielding, as the case may be, and regulating such adjustment.

I claim as my invention, and desire to secure by Letters :Patentl. The two hammers F and F', one having ahead and anvil for forging, and theother a head and anvil for A heading bolts, in combination with a double-cranked shaft for operating the hammers substantially in the manner set. forth.

2. The connecting-rods Dand D', each composed of two parts, with intervening spiral springs, all constructed substantially as and for the purpose described.

3. The combination of plate a, having the L-shaped slots c of the crank-rods, with the pins d of the vibrating arms E and E. l l

4. The spring-levers J'and J, spindles s and s', notched arms o', springs g', and the rods and chains herein described, in combination with the connecting-rods D and D and vibrating arms E and E', for the purpose specified.

5. The lever I and shaftp, with its arms n and p', in-combination with the hinged block or anvil H, its rod Z', and the Weighted chain m. v

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses..

lW. W. HUBBARD.

Witnesses:

C. E. FOSTER, JNO. B. HARDING. 

